remove accidental change

Dockerfile

@@ -29,7 +29,6 @@ ENV DJANGO_SETTINGS_MODULE "majak.settings.production"
 # fake values for required env variables used to run collectstatic during build
 RUN DJANGO_SECRET_KEY=x DATABASE_URL=postgres://x/x DJANGO_ALLOWED_HOSTS=x \
     OIDC_RP_CLIENT_ID=x OIDC_RP_CLIENT_SECRET=x OIDC_RP_REALM_URL=x \
-    CHOBOTNICE_RV_GID=x \
     python manage.py collectstatic
 
 EXPOSE 8000